1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // <vector> 11 12 // template <class... Args> void emplace_back(Args&&... args); 13 14 #include <vector> 15 #include <cassert> 16 #include "../../../stack_allocator.h" 17 18 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 19 20 class A 21 { 22 int i_; 23 double d_; 24 25 A(const A&); 26 A& operator=(const A&); 27 public: 28 A(int i, double d) 29 : i_(i), d_(d) {} 30 31 A(A&& a) 32 : i_(a.i_), 33 d_(a.d_) 34 { 35 a.i_ = 0; 36 a.d_ = 0; 37 } 38 39 A& operator=(A&& a) 40 { 41 i_ = a.i_; 42 d_ = a.d_; 43 a.i_ = 0; 44 a.d_ = 0; 45 return *this; 46 } 47 48 int geti() const {return i_;} 49 double getd() const {return d_;} 50 }; 51 52 #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 53 54 int main() 55 { 56 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 57 { 58 std::vector<A> c; 59 c.emplace_back(2, 3.5); 60 assert(c.size() == 1); 61 assert(c.front().geti() == 2); 62 assert(c.front().getd() == 3.5); 63 c.emplace_back(3, 4.5); 64 assert(c.size() == 2); 65 assert(c.front().geti() == 2); 66 assert(c.front().getd() == 3.5); 67 assert(c.back().geti() == 3); 68 assert(c.back().getd() == 4.5); 69 } 70 { 71 std::vector<A, stack_allocator<A, 4> > c; 72 c.emplace_back(2, 3.5); 73 assert(c.size() == 1); 74 assert(c.front().geti() == 2); 75 assert(c.front().getd() == 3.5); 76 c.emplace_back(3, 4.5); 77 assert(c.size() == 2); 78 assert(c.front().geti() == 2); 79 assert(c.front().getd() == 3.5); 80 assert(c.back().geti() == 3); 81 assert(c.back().getd() == 4.5); 82 } 83 #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 84 } 85
